Comment by Dragoniss

Comment by coolatomic360

I just got this today, can confirm it drops off the first boss in Blackwing Lair. :)

Comment by brothernads

For those wondering about the drop rate, Blizzard recently posted a little more detail. CM Brennvin said the following on a forum post (I added the bold font):

"We believe there was a lot of confusion when we originally announced this change and we're certainly at fault for said confusion. The original patch note was very vague to the point of being misleading. It was never our intent to weaken old raid boss encounters to allow anyone to have a chance to solo them, regardless of class, spec, or skill.

What we did change were encounters that were mechanically impossible for one person to accomplish, solely for the purpose of ensuring players have easier access to the hunt for the new rare companion pets -- the drop rates of which are actually set to account for a group of three players, not one.

Moving forward, though, we do not plan to adjust encounters for tougher raid bosses to be solo’able by all classes and specs."